<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:epub="http://www.idpf.org/2007/ops">
    <head>
        <title>EDUPUB headings test</title>
    </head>
    <body>
    	<nav epub:type="toc">
    		<h2>Table of Contents</h2>
    		<ol>
    			<li>Subsection 1</li>
    		</ol>
    	</nav>
    	<aside>
    		<h2>Aside</h2>
    		<p>Lorem Ispum Dolor...</p>
    		<section>
    			<h3>Aside Subsect</h3>
    			<p>Lorem Ispum Dolor...</p>
    			<aside>
    				<h4>Aside in aside</h4>
    				<p>Lorem Ispum Dolor...</p>
    			</aside>
    		</section>
    		<section aria-label="untitled subsection">
    			<p>Lorem Ispum Dolor...</p>
    		</section>
    	</aside>
    	<section>
    		<header>
    			<h2>Subsection</h2>
    		</header>
    		<section aria-label="implied grouping">
    			<aside>
    				<header>
    					<h4>Prelim</h4>
    				</header>
    				<p>Lorem Ispum Dolor...</p>
    			</aside>
    			<section>
    				<h4>Sub-sub-subsection</h4>
    				<p>Lorem Ispum Dolor...</p>
    			</section>
    		</section>
    	</section>
    </body>
</html>